|
|
|
| Numerical simulation of explosion-proof wall stress under the impact of coal mine gas explosion |
| Wang Zhenyu |
| China Coal Science and Industry Group Chongqing Research Institute Co., Ltd., Chongqing 400039, China |
|
|
|
|
Abstract As one of the serious coal mine safety production accidents, gas explosion will cause serious casualties once it occurs, and the explosion-proof wall can effectively resist the impact of gas explosion. Therefore, this paper studies the protective performance of the explosion-proof wall under the impact of coal mine gas explosion by numerical method. The correctness of the model is verified by comparing with the existing research. Then, the influence of radian on the performance of explosion-proof wall is systematically discussed, and the difference between traditional straight wall and arc-shaped explosion-proof wall is compared. The results show that compared with the traditional straight wall, the pressure behind the arc explosion-proof wall is smaller, and the weakening effect on the explosion shock wave is more significant. The response time of the explosion shock and the peak value of the horizontal pressure caused by the explosion are proportional to the horizontal distance of the measuring point behind the wall, and inversely proportional to the pressure decay rate. Compared with the horizontal pressure, the vertical pressure peak is larger, and the difference between the measuring points is more obvious. In the pressure curve of the 60°central angle condition, the peak pressure attenuation is obvious, and the pressure behind the whole wall is small. Therefore, the arc explosion-proof wall with a central angle of 60° has a better explosion shock wave reduction effect.
|
|
|
|
|
|
| [ 1 ] 胡宗波，魏敬徽.爆炸荷载作用下钢板混凝土夹芯砌体防爆墙的防护性能分析[ J ]. 钢结构（中英文），2023，38（ 5 ）：33 - 42.
[ 2 ] 王丽琼，肖 杰. 砌体填充墙防爆性能及临界破坏状态的数值模拟[ J ]. 安全与环境学报，2022，22（ 5 ）：2 461 - 2 468.
[ 3 ] 王 锐，薛鸿祥，袁昱超，等. 高温环境下海洋平台防爆墙结构冲击动力响应特性研究[ J ]. 上海交通大学学报，2021，55（ 5 ）：968 - 975.
[ 4 ] 葛 涛，曹洪瑞，张志刚. 快速拼装式防爆墙消波性能试验研究[ J ]. 振动与冲击，2019，38（ 15 ）：239 - 244.
[ 5 ] 周 清，王学武. 刚性防爆墙对4种典型街道内爆炸波的防护作用[ J ]. 安徽建筑大学学报，2019，27（ 6 ）：1 - 9.
[ 6 ] 陈培珠，陈国华，祁 帅，等. 防爆墙降低天然气长输管道风险的量化研究[ J ]. 华南理工大学学报（自然科学版），2018，46（ 2 ）：124 - 130.
[ 7 ] 马云玲，赵丽君，聂建新. 异型防爆墙抗空气冲击波的数值模拟[ J ]. 爆破，2010，27（ 1 ）：26 - 30. |
|
|
|
